Transcript

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>> Vote your conscience. Vote for candidates up and down the ticket.>> If Donald Trump's problems with Ted Cruz at the RNC are any sign, Hillary Clinton had better hope supporters of her rival Bernie Sanders get in line next week at the Democratic convention in Philadelphia. But when she announces her running mate, expected any time now, political correspondent John Whitesides says some of the remaining options won’t please the Sanders wing one bit.

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>> The two leading finalists that have attracted the most attention. The Agriculture Secretary in Obama's administration, Tom Vilsack, and Tim Kaine, the senator from Virginia, would both sort of double down on her message of competence and experience. They both have supported the Trans-Pacific Partnership which has been a big bone of contention in the Democratic Party and a huge priority for the Sanders wing of the party to try to kill.

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>> It's not all bleak, though. Progressive hero and Massachusetts Senator, Elizabeth Warren still in the mix, as is Labor Secretary Thomas Perez, also respected by the party's base.>> The Progressive wing of the party would be thrilled with Elizabeth Warren. That would've been their first pick all along.

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She seems to have fallen by the wayside. Her problem could be that while it's groundbreaking to have a woman at the top of the ticket, it would be particularly groundbreaking to have two women on the ticket. And the balance might not be that good. Perez might have lost some momentum in the last few days after reports that some of his biographical details and details about work his father had done in the Dominican Republic may not have been completely accurate.

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>> Also in the running, New Jersey Senator, Cory Booker and Housing Secretary, Julian Castro, two charismatic up-and-comers that could highlight the diversity of the Democratic electorate while still cleaving closely to Clinton on policy.>> Vice Presidential picks often tells us what the candidate thinks is most important, who they want to appeal to, what priorities they have.

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And this pick will give us a lot of clues about that.>> We are joining forces to defeat Donald Trump